The stabila 70p spirit levels have two horizontal vials so that even long levels can be read in any position and two vertical vials so whatever the position of the level is one vial is always visible the two bridging plates allow the level to to work on uneven surfaces suitable for carpenters for wooden constructions indoor works or wooden framework houses concrete workers to set up shuttering pre assembled walls girders and beams ironworkers for aligning steel girders and other steel compone